Connecting-rod



(No Model.)

M. GOUGHLIN. CONNBCTING ROD.

No. 592,487. Patented Got. 26,1897.

x/ mi c sd F W me Inventor.

Witnesses.

Attorney.

IINTTnn STATES Trice.

PATENT CONNECTlNG-ROD.

SPECIFICATION forming part of Letters Patent No. 592,487, dated October26, 1897.

Application led August 25, 1896. Serial No. 603,866. (No model.)

To @ZZ whom it may concern:

Be it known that I, MICHAEL COUGHLIN, of the city and county ofPhiladelphia and State of Pennsylvania, have invented an Improvement inConnecting-Rods, of which the following is a specification.

My invention has reference to connectingrods; and it consists of certainimprovements which are fully setforth in the following speciiication andare shown in the accompanying drawings, which form a part thereof.

The object of my invention is to provide a construction of pitman orconnecting-rod for engines and other machinery which shall have capacityfor automatic adjustment to compensate for any bent condition of thecrankpin or other defect in alinement or setting of the relative parts.

Heretofore in engines and machines employing pitmen or connecting-rodsit frequently happens that the crankpins are not true, or if true uponthe crank or head are caused to run untrue relatively to the crossheadby the main shaft being out of alinement. This causes the brasses in thepitman or connecting-rod to bind and produce excessive wear, friction,heating, and ultimate pounding. It also frequently causes the pin tobreak. My invention overcomes all of the injurious effects due to thesetroubles or defects in construction.

In carrying out my invention I provide the connecting-rod or pitman withadjustable brasses at one o1' both ends. I also prefer in some cases toprovide the brasses at one end with capacity for adjustment at rightangles to the adjustment to the brasses at the other end.

My invention comprehends specific details of construction which will befully understood from the accompanying drawings, which form a partthereof.

Figure l is a sectional side elevation of my improved pitman on line t't of Fig. 2. Fig. 2 is a sectional plan view of same on line s s ofFig. l. Fig. 3 is a cross-section of same on line m. Fi g. 4 `isacross-section of same on line y y. Fig. 5 is a cross-section of same online s s. Fig. 6 is a perspective view of a support for one of thebrasses, and Fig. 7 is a perspective view of a portion of the head.

A is the connectin g-rod or pitman. Secured to the end of the part A areend plates B B, which are fastened in place by bolts F F andclamping-plates E E. To properly center the plates B B upon thepitman-rod and hold them against lateral displacement while permittingof longitudinal adjustment, I provide the said plates with ribs or finsII, which fit into grooves or channels in the head of the rod. The outerfaces of the plates B B are grooved, as at G, the bottoms of saidgrooves being inclined and deepest toward the end of the rod. Theclamping-plates E E are provided with corresponding inclined ribs I,adapted to fit into the grooves or channels G, as clearly shown in Figs.l and A. The bolts F F have one end formed with a beveled face f topress against a corresponding edge on the plates B B. These bolts areextended through the parts to be clamped from opposite sides, so thatthe bevel f of one bolt acts upon one plate B and the bevel of the otherbolt acts upon the other plate B. By adjusting the nuts of these boltsthey are caused to act as wedges to draw the plates B B backward uponthe rod A. Simultaneously with this action the clamping-platesE E aredrawn toward each other, and while clamping the plates B toward the rodA they also tend to hold the plates B B against longitudinal movement.

Journaled in the ends of the plates B B and movable between them is abox C having trunnions c c, which act as axes of oscillation. Thesetrunnions c are provided with nuts c2 upon their ends for holding theplates B B and box C together. To remove in a large measure the strainfrom the trunnions c, I

provide circular bearings C', which fit into circular recesses orbearings upon the inner or under surfaces of the plates B B, as shown inFigs. 1 and 3.

D are the brasses and are made in two parts, one of which lits to thebox C and the other of which is made with a curved surface to fit acurved bearing d in the end of the pitmanrod A, which is curvedconcentric with the trunnions c.

It will now be understood that the brasses can move upon the trunnions cand bearings C to compensate for any defect in alinement of thecranlcpin. The brasses are adjusted too to or from each other by thebolts F F, which action is produced by drawing the plates B and boxC-toward the rod.

The other end of the connecting-rod or pitman `may be made in a similarmanner or may be of any other construction. A form ofcoustructionespecially adapted to cross-heads of engines I have shown as a preferredform. Referring to this, the end of the pitman is made loop-shaped andthe upper, lower, and outer end of interior of the aperture is madecurved, as shown at L, and to this the brasses K are fitted. The innerend of the brasses is made flat and receives a gib N, which is pressedtoward the brass by a key M, fitting between the gib and pitman-rod. Anadjusting-nut m is employed for adjusting the key.

As the brasses rest against a flat surface on the gib, it is evidentthat they may adjust themselves readily, turning upon the longitudinalaxis'of the pitman. rlhis gives capacity for universal adjustment of thebrasses and enables both ends of the pitman to co1npensate itself forlack of 'alinemfent ofthe crank and cross-head pin.

While I prefer the constructionfsh-own., Ido not confine myself to thedetails thereof, as they may bem'odiiied without departing from thespirit of my invention.

Vhat I claim as new, and desire to secure by Letters Patent, is asfollows:

l. The combination of the pitman 4vor rod,

with transverse adjustable brasses at each end of the pitma'n or rod thebrasses at 'one yend being hinged to the pitman or rod on a transverseaxis at right angles to the bearing and the box at the other end beingiitted to I 'the pitman. 'or rod 'and movable upon a lon'-,

gitudinal axis.

or pitma'n with brasses, a pivoted box or support for one of the brasseshavingi-ts axis off loscillation at right angles to the journal-bearingof the brassand adj ustably secured upon one end of the connecting-rod,a curved seat for the other brass formed lin the end of theconnectingaod 3. The combination of the connecting-rod 'or pitinan withbrasses, a pivoted box or support for lone o'f the brasses having itsaxis of oscillation at right angles to the journal-bearing fo'f thebrass and adjustably secured upon one end of the connecting-rod, acurved seat? adapted to said circular bearings, clampingfor Vthe 'otherbrassformed in the end of the i connecting-rod and adjusting devicesfor, moving the pivoted box or support to `or "from l the curved seat.

2t. rThe combination of the 4connecting-rod 'or ipitmfangwith twoindependent end plates adjustabl'y clamped Vto 'the rod to form a ilon-:gitudi-nally-adjustable fork, albox pivoted between the plates upontransverse journals,`

'clamped 'to the rod `to form fa fonk, 'trans-j verse clamping andadjusting bolts extending through the rod and respectively acting uponthe plates to adjust and hold them longitudinally upon the rod, a boxpivoted between the plates, and brasses carried by the box.

6. The combination of the connecting-rod or pitman, with two end platesadjustably clamped to the rod to form a fork, clampingplates havingwedge or inclined surfaces or parts for holding the end plates,transverse clamping and adjusting bolts extending through the rod andclamping-plates and respectively acting upon the plates to adjust andhold them longitudinally upon the rod, a box pivoted between the plates,and brasses carried by the box.l

7. The combination of the connecting-rod or vpitman, with two end platesadjustably clamped to the rod to form a fork and having ribs H,transverse clamping and adjusting bolts extending through the rod andrespectively acting upon the plates to adjust and hold themlongitudinally upon the rod, a box pivoted between the plates, andbrasses f carried by the box.

8. The combinationy of the rod A, end plates B, B, having ribs H,pivoted box C having journals in said end plates, and clampingbolts F,F, having the inclined surfaces f acting upon the plates, and brasses Dbetween the box 'and end of the rod.

9. The combination of the rod A, end plates B, B, having ribs Il, andgrooves G having inclined bottoms, vpivoted box C having journals insaid end'plates, vclamping-plates E, E, each having inclined ribs Ifitting into the grooves G, and clamping-bolts F, F, having the inclinedsurfaces f acting upon the plates- I Q and extending through theclamping-plates, l2. The combination of the connecting-rod and brassesll) between the box and end of the rod.

lfO. The combination of the rod A, the end plates B, B, adjustablysecured to the rodfand having circular bearings upon their extendedends, a box C having bearings C' adapted to said circular bearings, andbrasses carried by 'said box.

'11. The combination of the rod A having a curved seat CZ in its end,the end plates B, B, Ia'djustably secured to the rod and having circularbearings uponl their extended ends, a box 'C having trunnions c c andbearings C nuts C2 for 'the screw-threaded trunnions c, and brassescarried by said box and extending to the curved seat in the rod.

l2. The combination'of the rod.A,end plates B., B, brasses held to theend of the rod by the end plates land clamping and adjusting screws F,F, extending through the rod and V'having inclined or cam surfaces fadapted to act respectively upon the end plates to move themlongitudinally upon the rod for adjust- `ing the brasses.

13. The combination ofthe rod A, end plates 15,13, having grooves formedwith inclined IOO IIO

bottoms, brasses held to the end of the rod by the end plates,clamping-plates E, E, having inclined ribs I fitting the grooves, andclamping and adjusting screws F, F, extending through the rod and clampin g-plates and having inclined or cam surfaces f adapted to actrespectively upon the end plates to move them' longitudinally upon therod for adjusting the brasses. v

lil. In a pitman or connecting-rod7 the combination of the rod, withbrasses at each end provided with parallel transverse holes or bearingsand pivoted or journaled to the rod the brasses on one end being pivotedor journaled at right angles to the length of the rod and those at theother end being pivoted upon an axis parallel to the length of the rodand transversely to the hole or bearing.

l5. The combination of the pitman-rod, with brasses secured to the endthereof and provided with a transverse hole or bearing always maintainedat right angles to the length of the pitman and journaled upon alongitudinal axis whereby the brasses rotate only upon an axis parallelwith the length of the rod and means to hold thebrasses against movementexcept at right angles to the length of the pitman.

16. The combination of the pitman-rod, split brasses secured to the endthereof by a journal permitting rotating motion only on a longitudinalaxis whereby the bearing therein is always maintained at right angles tothe length of the pitman7 and a gib and key device fixed to the pitmanand having a movable joint with the brasses for adjusting the brasses tocompensate for Wear and holding them against movement exceptingtransversely to the length of the pitman.

17. The combination of the rod A having looped end J, brasses K movableWithin said looped end about a longitudinal axis only, a gib N fittedtransversely to the pitman-rod and directly acting upon the brasses, anda key M for adjusting the gib In testimony of which invention I havehereunto set my hand.

MICHAEL COGHLIN.

Witnessesz R. M. HUNTER, WM. L. EVANS.'

